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Ceramvar Alloy Vacon20
Pricision Alloy 4J33/4J34(YB/T5234-1993)
*Ceramvar alloy, ASTM F1466, (Fe-Ni27-Co25), Chinese 4J33/4J34
Main application:Match with the electricity vacuum industry with the ceramics to seal meets.
Cross Reference:
Grade |
Russia |
U.S.A. |
Japan |
Germany |
4J33 |
33Hk(Ni33Co17) |
- |
KV-4(Ni33Co17) |
- |
4J34 |
31HK(Ni31Co20) 24HK(Ni25Co18) |
Ceramvar(Ni27Co25) |
- |
Vacon20(Ni28Co20) |
Grade & Chemical Composition (See Table 1)
Table 1 Grade & Chemical Composition
Grade |
Chemical Composition (%) |
|||||||
C |
P |
S |
Mn |
Si |
Ni |
Co |
Fe |
|
≤ | ||||||||
4J33 |
0.05 |
0.020 |
0.020 |
0.50 |
0.30 |
32.1~33.6 |
14.0~15.2 |
Balance |
4J34 |
0.05 |
0.020 |
0.020 |
0.50 |
0.30 |
28.5~29.5 |
19.5~20.5 |
Balance |
Notes:
Under condition that the average coefficient of the linear expansion meets the requirements o
the standard, the content of nickel and cobalt are allowed to deviate from the stated range.
2.The shape and dimensions of the alloys are in compliance with GB/T14985.
Mechanical Properties (See Table 2—Table4)
Table 2 Tensile Strength (for wires)
Symbol |
State |
Tensile Strength |
R |
Annealed |
<585 |
1 |
Unannealed |
>860 |
Table 3 Tensile Strength (for Strips)
Symbol |
State |
Tensile Strength/MPa |
R |
Annealed |
<570 |
l |
Unannealed |
>700 |
Table 4 Hardness of Deep Stamping Strips
State |
Thickness |
Hardness HV |
Deep-Stamping |
>2.5 |
≤170 |
≤2.5 |
≤165 |
Physical Property (See Table 5 & Table 6)
Table5 Linear Expansion Cofficient
Grade |
Heat treatment of the samples |
Mean Coefficient of Linear Expansion ã/(10-6/K) |
|||
20~300°C |
20~400°C |
20~500°C |
20~600°C |
||
4J33 |
Heat to 900±20°C in the protective atmosphere or in vacuum condition, hold for 1 hour, cooled to 200°C at a rate less than 5°C/h, and take out from the furnace. |
|
6.0~6.8 |
6.6~7.4 |
|
4J34 |
|
6.3~7.1 |
|
7.8~8.5 |
|
Table 6 Typical Coefficient of Linear Expansion
Grade |
Mean Coefficient of Linear Expansion at Different Temperature ã/(10-6/K) |
||||
20~200°C |
20.300°C |
20~400°C |
20~500°C |
20~600°C |
|
4J33 |
7.1 |
6.5 |
6.3 |
7.1 |
8.5 |
4J34 |
7.5 |
6.9 |
6.6 |
6.9 |
8.3 |
Note: The values in the tables are for reference only.
Specification: Sheet/Plate, Bar/Rod/Wire/Coil,Capillary/Pipe/Tube
Size Range:
1. Sheet---Thickness 0.1mm~3.5mm, width:≤300mm,Condition: cold rolled, bright, bright annealed
2. Plate---Thickness 3.5mm~40.0mm,width:≤300mm,Condition: cold rolled, hot rolled, annealed
3. Round Wire---Dia 0.1mm~Dia 5.0mm,Condition: cold drawn, bright, bright annealed
4. Flat Wire---Dia 0.5mm~Dia 5.0mm,length:≤1000mm,Condition:flat rolled, bright annealed
5. Bar---Dia 5.0mm~Dia 8.0mm,length:≤2000mm,Condition:cold drawn,bright, bright annealed
---Dia 8.0mm~Dia 32.0mm,length:≤3000mm,Condition:hot rolled,bright, bright annealed
---Dia 32.0mm~Dia 180.0mm,length:≤1300mm,Condition:hot forging,peeled, turned, hot treated
6. Capillary---OD 8.0mm~1.0mm,ID 0.1mm~8.0mm,length:≤2500mm,Condition: cold drawn, bright, bright annealed
7. Pipe---OD 120mm~8.0mm,ID 8.0mm~129mm,length:≤4000mm,Condition: cold drawn, bright, bright annealed
